Recording-thermometer.



W. L ERIEDMAN.

RECORDING THERMOMETER.

APPLICATION FILED Nov.7,1912.

Patented Aug. 4, 1914,

3 SHEETS-SHEET l.

IN VE N TOR /l/. //fpM/w /m/ y By ATTORNEY WIT/VESSES:

W. L. FRIEDMAN.

RECORDING THERMOMETER.

APPLICATION FILED Nov. 7, 1912.

1,105,898. Patented Aug. 4, 1914.

BSHEETS-SHBET 2.

IN l/E N TOR WL. FFI/aww W. L. PRIBDMAN. RECORDING THERMOMETER.

APPLIGATON FILED NOV.7, 1912.

1,105,898. 'Patented Aug.4,1914

SSHEETS-SHEET 3.

IN VE N TUR M MMMW WILLIAM L. FRIEYDIYIAN, @E QKLNTE, CALIFORNIA.

BECGRUIN G-THERMGME TER. i

Application filed November i", 35H55.

Speeieaton of Letters Patented Aug. 4, 1914. Nc. refiere.

T0 fiZZ whom it 97mg/ 'concern Be it known that l", llvrnnmia L. Finnoiaarr, a citizen of the United States, resid ufr ahland, in the county of Alameda and ot California, have invented a new and useful Reoording-Thermometer, of which the ollovving is a specication, in such full and clear terms as will enable thc-s skilled saine.

Tais invention relates to a recording" thermometer,y and its object is toprovide an accurate, automatic and continuous record temperature changes for clinical and othe purposes. 4

fin especial object of the invention is to` provide a thermometer for clinical use in taking,n cody temperatures.

lt ui' those sl lied in medical science that in certain diseased conditions the temierature will fall suddenly from a very high to suhnorinal temperature called a fall by lysis,7 or airain there is the :so-called step ladderiiall. Tr order to malte the most use of the thermometer' in the treatment of such diseases, it is necessary to provide continuous record in order to diagnose and differentiate the various febrile conditions. lith this instrument a continuons temperature record is obtained so that it becomes possible to at once determine from the record precisely what fluctuations of temperature have occurred during; any given period, thus cnaloling the physician to more accurately diagnose the conditions during that period.

, in object of the invention is to provide a. thermometer which may be left in place during,` any length of time necessary, the recorder indicating at all times the variations of temperature.

Another object of the invention is to pro vide accurate means for the indication of the rise and fall of the thermometer bead.

In the draivin s in which the .same numeral of reference 'is applied to the same portion7 throughout the several views, Figure l is a side elevation` of the recording mechanism, a portion 'of the oase therefor being broken a-Way on section line B-B Fig. 2 to show the interior apparatus, Fig. 2 is a plan View of the recording mechanism, a portion of the case therefor beine broken away on the dotted line .A-A' Fig. Lto

show the interior thereof, Fig. 3 is a vertical` sectional view oi"- the thermometer used for D the art to construct and use 'thehe understood by physicians and melting the several electrical contacts, Fig. ai vertical sectional vienY of the thermometer having one portion thereof at right angles to another portion in order that the plunger may always be used in a substantially rertica position, ig. 5 is a plan view of three of the magnets and a portion or' the pointe*x used for making the record upon the c., finder, ig. 6 is a side elevation of the a portion of the pointer used tor inaizing the record upon the cylinder, l? 'Y is a side elevation or a recording instrument which may he used in connection with thermometer in 1which visible and audible signals are used to indicate tempera ture changes, making the examination of the paper strip unnecessary save when it is desii-ed to ascertain the complete record off temperature changes, Fig. is a side elevation of one oi the magnets used Awith this forni of the invention, and Fig. 9 is diagram the electric Wiringriior operating the lights and hells.

The numeral l indicatesa suitable .rectangular hon having a transparent Window 2 through which the recording cylinder may be observed. i suitable clock 3 is inserted in an opening in the side oit the case and this clock has a shaft l extending therefrom and upon which the cylinder 5 is mounted. rl`his shaft is supported in uprights 6 and l'. At the end of the hoi: there is paper supply roll 8 mounted upon brackets 9 and l0, a spring il secured to the bottoni of the hoi: hearingvupon the underside, of the paper supply roll to prevent the paper from un- Winding' therefrom too rapidly. The paper strip l2 has one end suitably secured to the cylinder 5 and the clock movement causes said cylinder to Wind the paper up thereon.

The paper strip may he ruled .upon both.

sides as indicated in 'order to provide the means for making use of each strip twice.. At the end of 'the box opposite from the paper feed roll are tivo'suitable bearings 13 and 14, one at the bottom and the other at the top of the hex, said hearings supporting a rod l5 to which rod arms 16 and 17 are scoured. The arm 18 carries a small piece of iron or other magnetic material as indicated at 18, While the arm i7 .carries a suitable pencil or pen 19, said the top of the cylinder 5.

' Mounted Within the box are suitable hat- `tries B from which Wires 2l and 22 extend to a cable 23. The cahle 23 has a plurality pencil bearing upon wardly more ot wires 2t extending thereinto, two ot each of said wires leading to each otn the magnets 25, there being such a number of magnets as is deemed necessary to cover the desired temperature range.

ln order to positively control the movement ot the needle and prevent it 'from moving entirely away from the magnet energized, each magnet is provided with a pivoted armature 25, a wirea supporting a light spring` 25h adjacent and bearing on each armature 25. lllhe result of this construction is that the arm is locked in front of the magnet energized, the two sides preventingl it from moving till one or the other is energized. lt will be seen that the pivoted armatures are caused to-move outwardly away from the magnets by the light springs bearingA thereupon, but these lsprings cannot move these armatures outthan a ixcd amount,` since each is provided with a heel piece which bears upon the base plate P, upon which all ot' the magnets and their movable armatures are mounted. tures tend to move voutwardly they do not do so with sufficient force to prevent the next adjacent magnet from pulling the record arm armature away from the magnet which has just been demagnetized. It will also be understood that the pivoted armatures are of a suitable maffnetic vmaterial so that their effect upon the record arm armature is substantially the same as if the magnet itself was adjacent said record arm armature.

The cable 23 extends to the thermometer 2d and the wires 24 are let into the glass of the thermometer head at a short distance from each other as indicated at 27, while a single wire 28 also extending from the cable 23 is let into the opposite side of the glass as 1n-' dicated at 29 and Vis connected with a metallic bar 30.

T he thermometer comprises the usual globe 31 Jfor containing the desired liquid to indicato the rise and fall of temperature, a stem 32 and an enlarged chamber through the walls of which the wires 24 and 28 extend. Fitted into the stem 32 is a hollow glass plunger 34, said glass plunger bein;l carefully ground so 'that it tits the opening in said tube 32 as smoothly as possible. This glass plunger carries a metallic top 35, said metallic top affording a circuit between the rod 30 and any of the wires 24:-, with which it may be in contact. The top 35 moves in two grooves to prevent it from rotating away from the electrical circuits.

ln operation the thermometer is placed in any place the temperature of which is to be recorded, as for example, the bow of a ship, or in the mouth of a fever patient and as the column of mercury within the tube 32 rises and falls, the several circuits to the differentV magnets will be made or broken armatures at the- Also while these pivoted arma niemeer-i and as these circuits are made and brolre'n the pointer 16 will be moved from one magnet to another and will in the same way move the pointer l?. rlhe pointer 17 will make a mark upon the paper' cn the cylinder 5. Since the pointer l? moves about a center the marks upon the paper to indicate time must be curved as shown.

ln Fig. 4l there is indicated a modified form ot the thermometer for use in positions where it is not convenient tense the thermometer shown in Fig. 3. ln this ligure the top of the thermometer is precisely the same as that shown in Fig. 3, but the stem 4() is provided with a portion 4l turned at right angles to the main stem, thus enabling the bulb l-2 and stem 4l to be placed in a horizontal position while the portion of the stem indicated at l0 will occupy a vertical position. lt will be understood that the interior of the thermometer is under a high vacuum as is common in the art, so that there will be little resistance to the up and down movement of the stem 34.

T he numeral l5 indicates the case within -which the recording apparatus is installed.

This apparatus is substantially the same in every respect as that illustrated in liin. l, encept that the magnets 4.6 are mounted upon a base platee-and in iront oi each magnet is the pivoted armature 48, said armature having a heel piece 9 to prevent it from fall mg teo far away from the magnet, and it has a rearward extension 50 which makes contact with a spring` 51. This-spring is suitably supported on the base plate 47 by means of an insulated block 52 and it has an electric wire 53 connected therewith. Connected with the underside of the plate el? is a wire 54: which extends to the battery B.

All of the electric wires extending from the recording apparatus to the thermometer are incased in a suitable cable 55, the same as the cable 23. Mounted upon the top of the casing are sin lights 56, 57, 58, 59, 60 and 61. These li` lits may be of ditiferent colors in order that the attention ot the attendant may be readily drawn to the changes in them. 0n the side of the casing 45 are two bells62 and 63, said bells being of such shape as to give characteristic tones.

The diagram of the wiring (Fig. 9) illustrates the manner or operating the lights and bells with changes in the temperature at the thermometer. The lights are operated from the battery by means of the wires 54 and 64- and the several wires 53, 53", 53", 53d and 53e. The wires 53 to 53e inclusive are so connected that the energizing of any one of the six magnets in aseries will operate one of the lights 56 to 6l inclusive, the entire temperature range being thus divided into six parts for convenient visual observation.

ln order that there may be an audible CII ' gized to cause' the record arm have a signal at a high or low point the bells G2 and 68 are used. The bell 62 has a wire 65 extending to and connected with the base plate 47, to which the wire 53 is connected and it has a wire 6G connected with one of the outgoing leads 67 of one of the magnets Li6 of 4the series at a point near one end of the set. In the same way the bell 63 has a wire G8 connected to the base plate 47, and it has a wire ('39 connected to one of the outgoing leads 70 of one of the magnets 46 near the other end of the series, so that. if the temperature goes unduly low or unduly high the bells will give notice thereof in addition to the notice given by the change in the lights. It. will be understood t-hat the record mechanism with this form ot' the invention is substantially the same as that shown in Fig. l.

It will be understood that in order to plunger of such size as tto be operable for the purpose herein desired, that it is necessary to have the bead of the thermometer larger than is commonly the case with. the ordinary thermometers, and in order to give the plunger the necessary travel the quantity ot indicating Huid in the bulb must be considerably greater than with the ordinary thermometer. It is also to be'noticed that the metal tip at the top of the plunger must be so shaped as to travel up and down without disturbing the contacts. it makes with the several circuits, and this is accomplished by having the sides of the thermometer tube grooved.

Having thus described my invention what I claim as new and desire to secure by Letters Patent ot the United States, is las follows:

l. In a recording device, a thermometer, electrical circuits connected therewith, means in the thermometer to. close different electrical circuits upon temperature changes, a record strip, a series of magnets connected with said circuits, and a record arm movable over the record strip upon theenergizing of said magnets, substantially as described.

2. In a recording device, a thermometer, electrical circuits connected therewith,

means in the thermometer to close diiierent electrical circuits upon temperature changes, a record strip, a series of magnets connected with said circuits, a record arm movable over the record strip, and an armature locked in proximity to said magnets and moved thereby when said magnets are enerto move over the record strip to make a record thereon, substantially as described.

3. In a recording device, a thermometer, electrical circuit.- connected therewith, means in the thermometer to close different electrical circuitts upon temperature changes, a record strip, means to move said record 'strip at. a fixed rate, a series of magnets connected with said circuits, a record arm movable over the record strip, and an armature adjacent the magnets for moving the arm over the record strip to make a record thereon, substantially as described.

4. In a recording' device, a thermometer, electrical circuits connected therewith, means in the thermometer to close different electrical circuits upon temperature changes, a record strip, means to move said rec-ord strip longitudinally at a determinate rate, a series of magnets connected with said circuits, -a record arm movable over the record strip to malte a record thereon, an armature adjacent the magnets, and means to lock the armature adjacent the particular magnet energized, substantially as described.

5. in a recording device, a thermometer, electrical circuitsconneoted therewith, means in the thermometer to close different electrical circuits upon temperature changes, a record strip, means to move said record strip longitudinally at a determinate rate, a series of magnets connected with said circuits, a pivoted armature adjacent each magnet, and an armature carried by the record arm and close enough ,to the magnets to be locked adjacent the magnet energized by the two next adjacent armatures, substantially as dei scribed.

6. In a recording device, a thermometer, electrical circuits connected therewith, means in the thermometer to close different electrical circuits upon temperature changes, a record strip, means to move said record strip longitudinally at a determinate rate, a series ot magnets connected with said circuits, a record arm movable over the record strip, an armature adjacent said magnets and carried by the record arm, and means to prevent the armature from shifting from one magnet to another until been demagnetized, substantially as de scribed.

7. In a recording device, a thermometer, a bulb thermometer, a plunger therein, a suitable fluid material in said thermometer and in contact with said'plunger for moving the latter upon .temperature changes, a series of electrical circuits connected with said thermometer, means carried by the plunger to close ditierent electrical circuits upon temperature changes, a record strip, a series of magnets, and means operated by said magnets for making a record upon said strip, substantially as described.

In a recording device, a thermometer,

electrical circuits connected therewith, a

suitable temperature indicating fluid in said thermometer, a plunger in said thermometer and in contact with said fluid, means carried by the plunger to close different electrical circuits upon temperature changes, a record strip, means to move said record strip the irst magnet has vconnected with said circuits,

at a determinaterate, a series of magnets and a record arm having means operated by the magnets to movesaid arm over said strip, substantially as described.

9. A recording instrument comprising a thermometer, electrical circuits 4connected therewith, means carried by the thermometer to close certain of the electrical circuits upon temperature changes,v a recording apparatus comprising,1 a movable arm to produce the record', movable armatures to se cure the arm in a `given position, and a series et visible electrical signalsloperated upon temperature changes atthe thermometer by closing certain of said electrical circuits, substantially as described.

l0. t recording instrument comprising a thermometer, electrical lcircuits) connected there "with, means operated by the thermometer to close certain ot said circuits, a record apparatus comprising; a movable arm to produce a record,l1novable armatures to secure "incassa the arm in a given position, and audible signals connected With the apparatus and operated by temperature changes at the thermometer by said armatures closing certain circuits, substantially as described.

ll. lin a recording instrument, a thermometer, electrical circuits connected there with, means carried by the thermometer to close certain of said circuits, a recording apparatus comprising a movable arm to pro duce the record,movable armatures to secure the arm in a given posi ion, and a series of wisible and audible signals operated by said armatures closing certain of said electrical circuits, substantially as described.

ln testimony whereof ll have hereunto set my hand this Q5 day ot @ctober A. D. 191i, in the presence of two subscribed Wit.- nesses.

"WltLLlM L. FRHDMAN.

Witnessesz C. P.-GR11TIN HENRY B. lins'rnn. Q 

